cosmography_delay

Time delays from the literature

For a partial overview visit the Leiden group Hubble constant homepage.

The table below is based on the table from the Leiden group homepage (with some minor changes), with additional systems added at the bottom of the table.

System	zl	zs	references (D=discovery, ZL=lens z, ZS=source z, TD=delay)	time delays (days)	Environment	Comments
B1608+656	1.394	0.630	[1], Fassnacht et al. 2002, ApJ 581, 823, TD [2], Myers et al. 1995, ApJ 447, L2, D, ZL [3] Fassnacht et al. 1996, ApJ 460, L103, ZS	BA=31.5p3m2 BC=36pm2.5 BD=77p4m3	group 150 km/s Fassnacht et al. 2004 (+los)	95% CL
PG1115+080	1.722	0.31	[4]Weymann et al. 1980, Science, 118, 4, D, ZS [5], Schechter et al. 1997, ApJ 475, L85, TD [6] Tonry 1998, AJ 115, 1, ZL	AB=13pm2 BC CD=11pm2	group 440 km/s Momcheva et al. 2006 (+los)	Where are those values from?
HE1104-1805	2.32	0.73	[7], Wisotzki et al. 1993, AA 278, L15, D, ZS Kochanek et al. 2006, in prep, TD [8], Lidman et al. 2000, AA 364, L62, ZL	AB=161pm7	(small los?)	Ref. not public
HE2149-2745	2.03	0.49 0.50?	[9], Wisotzki et al. 1996, AA 315, 405, D, ZS [10], Burud et al. 2002, AA 383, 71, TD, ZL	AB=103pm12	small los Momcheva et al. 2006	1sigma
B1600+434	1.59	0.42	[11] Jackson et al. 1995, MNRAS, 274, 25L, (D and ZS) [12] Burud et al. 2000, ApJ, 544, 117(TD) [13] Fassnacht, Cohen, 1998, AJ, 115, 377 (ZL)	AB=51pm4	group 100 km/s Auger et al. 2004	95% CL
FBQ J0951+2635	1.24	(0.24)	[14] Schechter et al. 1998, ApJ, 115, 1371 (D) [15] Jakobsson et al. 2005, A&A, 431, 103, (TD and ZL)	AB=16pm2	several los groups Williams et al. 2006	1 sigma
HE0435-1223	1.689	0.46	[16] Wisotzki et al. 2002, A&A 395, 17 (D) [17] Kochanek et al. 2006, (TD) [18] Morgan et al. 2005, AJ, 129, 2531 (ZL)	AB=-8.0p0.7m0.8 AC=-2.1p0.8m0.7 AD=-14.4p0.8m0.9	(los ?)	1 or 2 sigma?
RX J1131-1231	0.658	0.295	[19] Sluse et al. 2003, (D and ZL) [20], Morgan et al 2006 astro-ph/0605321(TD)	AB=11.98p1.52m1.27 AC=9.61p1.97m1.57	group and los Williams et al. 2006	1 sigma
SBS1520+530	1.86	0.72	[21], Chavushyan et al 1997 AA 318, L67, D, ZS [22], Burud et al. 2002, AA 391, 481, TD, ZL	AB=130pm3	(los groups?)	1 sigma
Q0957+561			Vanderriest, C. et al, 1989, A&A, 215,1 (TD)	415pm20		1 or 2 sigma?
B1422+231			Patnaik, A.R. &Narasimha, D., 2001, MNRAS, 326, 1403 (TD)	1.5pm1.4 (B-A) 7.6pm2.5 (A-C) 8.2pm2.0 (B-C)	group 470 km/s Momcheva et al. 2006	1 or 2 sigma?
RX J0911+0551			Hjorth, J. et al., 2002, ApJ, 572, 11L(TD)	146pm8 ((A1+A2+A3)-B)		2 sigma
B2018+357			Biggs, A.D. et al., MNRAS, 304, 349(TD)	10.5pm0.4		95% CL
PKS1830-211			Lovell, J.E.J. et al., 1998, ApJ, 508, 51L(TD)	26p4m5		Width of distribution at half peak
J1650+4251			Vuissoz, C. et al., 2006, A&A submitted(TD)	49.5pm1.9		1 sigma
J1004+4112			Fohlmeister, J. et al., 2006, ApJ submitted(TD)	38.4pm2.0		at Delta Chi^2=4
SBS0909+532			Ullán, A. et al. 2006, A&A, 452, 25(TD)	45p1m11		95% CL

Ongoing efforts to measure time delays

GLENDAMA project: Q0957+561, HE 1104-1805, Q2237+0305

COSMOGRAIL: Goal to measure time delays with <2% precision, using 5 medium sized telescopes (1.2-2.0 m)

Kochanek, C and various collaborators (any fancy name - homepage etc.?).: J1004+4112, HE0435-1223, others?